no
disabled or
<select name=s onchange="selectedIndex=f">
<option>1
<option selected>2
</select>
<script>var f=s.selectedIndex</script>
disabled or
<select name=s onchange="selectedIndex=f">
<option>1
<option selected>2
</select>
<script>var f=s.selectedIndex</script>
你说的意思是不是不能改变当前选择项